Thanks, Neil. Do you have the cite for this study? [*see note below]
HIFA profile: Pamela Sieving is a special volunteer at the National Eye Institute/National Institutes of Health, and an independent consultant in biomedical information access; she works primarily in the vision community to increase access to information needed to preserve and restore vision. pamsieving AT gmail.com
[*Note from HIFA moderator (Neil PW): Apologies, I omitted the link. The message refers to a BBC article here:
that links to the Association of Optometrists website
and their campaign 'Stub it out'